Compound brake mechanism



E. POSSON. coMPouNn BRAKE MECHANLSM. APPuAT'loN f zLEb FEB. 21, 192,0I

Patented No.6, 1921.

2 SHEETS- TSHEET I.

v E. POSSON.

coMPouNn BRAKE MECHANISM.

APPLICATION FILED FEB. 27, |920.

Patented me. 5, 192m 2 SHEETSHEET 2.

anism applied thereto;

EDWARD POSSON, 0F CHICAGO, ILOIS.

COMPOUND BRAKE MECHA'NISM.

assauts.

Specification of Letters Patent.

Application ledl. February 27, 19120. erial No. 361,645.

used for multiplying the power transmitted through the brake mast or shaft. The prin# cipal object is to provide aV housing containing multiplying gears which may be applied to the lower end of the usual vertical brakek mast without altering any of the parts of the usual car construction. Other objects relate to various features of lconstruction and arrangement which will appear more fully hereinafter.

` The nature of the invention will be understood from the `following specification taken with the accompanying drawings in which one embodiment is illustrated.

ln the drawings- Figure 1 shows a top plan View of the end sill of the car with my improved brake mech-l Fig 2 shows an end elevation of the end sill and brake mechanism; t

Fig. 3 shows a vertical section on the 3-3 of Fig. 2;

Fig. 4 shows a horizontal sectional view on the line 4 4 of Fig. 3; and I Fig. 5 shows a perspectiveview of the housing in which the gears and'counter shaft are mounted.

The invention is shown applied, to brake mechanism located at thje end of arailway car which comprises an end sill made' up of a transverse channel beam 10 andanupper horizontal plate 11. The usual longitudinal sills 12 extend longitudinally from the transverse vbeam 10. The usual step 13 is located at the end of the car beneath thev end sill, this step comprising the lower horizontal portion 13a adapted to be engaged by 'the foot of the brakeman or other trainman. The upper arms of the step are twisted, as shown at 13, so that the upper ends thereof lie parallel to the channel beam 10 to which they are secured by rivets 14. A vertical4 brake mast or shaft 15 extends upwardly atl the end of the car on the outer side of the line' end sill and the lower end of` this brakev mast is provided with a part 15y which is re"- duced i n diameter and journaled in a bearing which is formed in the lower horizontal portionl3a of the step 13, this part of .the s tep being offset outwardly from the end sill, as shown in Fig. 3. rlhe brake mast extends upwardly in close proximity to the edge of the plate 11 and is journaled loosely in a bearin 16 which is formed as a part of a. bracket l secured by rivets 18 on the uprate'ateii pela s, resi.,

per surfaceof the plate 11. A ratchet wheel 20 is. secured to the brake mast 15 above the bearing 16 by means of a key 21 and this ratchet wheel is adapted to be engaged by a pawl 22 which is pivoted on the bracket 17 by means of a bolt 23. The pawl 22 has an arm 22a adapted to be engaged by the foot of the brakeman when it is desired to release the ratchet wheel and permit the rotation of the brake mast. It wilLbe understood that l the brake mast extends upwardly and is pro vided on the upper part thereof with a hand wheel or other usual means for rotating it.

The brake mast is provided adjacent'its lower .end above the step 13awith an' enlarged portion 1511 which ordinarily serves as a drum upon which the brake chain is wound. The present-invention contemplates the re moval of the brake chainfrom the drum 15b and the substitution at the lower end of the brake mast of multiplying gears byvwhich4r the power applied to the brake chain is increased at the expense of an increased relative .rotation ofthe brake mast. Thisimprovement comprises a housing 25 which embodies a vertically extending bearing portion 25x1 journaled onV the part 15b of the mast and -formed integrally withv the upper and lower arms 25b and y25", respectively. The upper and'lower arms of the housing are reinforced ontheir inner sides by a rib 26 yand the lower armof the housing coml prises `upper and lower walls 27 and 28, re-

s ctively, which are spacedv apart and partiallyy or. whol'lyinclosed to form an intervening chamber-29. The lower wall 28 is provided with an aperture 30 adapted to be rotatably engaged by the reduced portion 15a of the brake mast, and the portion of the drum'15"iimmediately above the part 15a is 'cut down to form a part 3l of rectangular crosssection adapted to be engaged by a pinion 32 located in the chamber 29. This pinion meshes with a larger gear 33 which is also mounted between the walls 27 and 28 and which is engaged by a rectangular part of the lower arm of the housing. Vertical Y movement of the counter shaft and of the brake mast 15 is prevented by means of .ins 37 extending through the apertures w ich are formed inthe lower extremities of these shafts. 'Ihat portion of the drum 35 which lies between the upper and lower armsof the housing is adapted to eiiect the winding l of the brake chain 38 which is secured thereto by means of a transverse bolt 39.

Upon rotation of the brake mast 15, the pinion 32 at the lower end thereof drives the larger gear 33 and effects the winding of the chain 38 upon the drum 35. The housing 25 is adapted to swing freely on the mast l15 but it ordinarily assumes the position illustrated in Fig. 3 b reason of. the pull exerted by the chain 38. t will be observed that the multiplying gears and the counter shaft are mounted inthe housing 25 to form a compact structure which may be conveniently applied to the brake mast 15. The only modication of the brake mast or of the usualbrake mechanism, which is necessary in order to combine the present invention therewith, is the provision of a squareV por- `tion '31 at the lower end of the brake mast and this can be conveniently provided` by cutting down the lower extremity of the enthat it may be constructed in various other forms without departingfrom the scope of the appended claims.

I claim: 1. In combination, a brake mast, a 4housl ing rotatably mounted withrespect to said mast, and compound brake mechanism carried by said housing and connected to said mast.

2. In combination. a brake mast, a hous- 'ing rotatable freely on said m'ast, a counter shaft journaled in said housing, and gear.

` mechanismv connecting said mast with said counter shaft.y

3. In combination, a vertical brake mast, a bearing for the lower end of said mast, a housing supported by said bearing and rotatably engaged by said mast, and compound brake 'mechanism carried by said housing and o erated by said brake mast. Y

4. n combination, a railway car having an end sill, a brake mast extending vertically past said sill, a step carried by said sill and having said brake mast journaled therein, a housing' journaled on the lower end of said brake mast, and v brake mechanism Amounted in said housing and connected to said brake mast.

5. In combination, a railway car having an end'sill, a brake mast extendin vertically past said sill, a step carried y said sill and having said brake mast journaled therein, a housing journaled on the lower end of said brake mast and supported by said step, and gear mechanism carried by said housing and driven by said brake mast.

6. In combination, a railway car having an end sill, a brake .mast extending vertically past` said sill, a step carried Vby said sill and having said brake mast journaled therein, a housing journaled on the lower- ,end of said brake mast and supported by said step, gear mechanism carried by said housing and driven by said brake mast, and ratchet mechanism mounted on said end sill for controlling the rotation of said brake mast. l.

7. In combination, a brake mast having an enlarged drum portion, a housing rotatably engaged by said drum portion, a counter shaft journaled in said housing parallel to said brake mast, a pinion fixed on said brake mast, a gear fixed on said counter-.shaft and meshed with said pinion, and a brake chain connectedto said counter shaft.

8. In combination, a brake mast, a housing comprising upp'enand lower arms and a hub portion journaled on said brake mast', said lower arm comprising upper and lowerwalls forming a chamber, a counter shaft journaled in said upper and lower arms, a pinion mounted in said chamber on said brakemast, a gear mounted on said counter shaft within said chamber, and brake operating means connected to said counter shaft be-` tween said upper and lower arms.

9. In combination, an end sill, a brake mast extending vertically past said end sill, supporting means mounted on said brake mast below said sill, a counter shaft journaled in said supporting means, and means for connecting said mast with said counter shaft.

l0. In combination, an end sill, abrake mast extending vertically past said end sill, a bracket secured to said end sill and having said brake mast journaled therein, a ratchet wheel mounted on said brake mast adjacent said bracket, a detent mounted on said bracket and adapted to engage said ratchet wheel', a step connected to said end sill and 'having said-brake mast journaled in the lower part thereof, a housilng resting on said step and rotatably engaged by said brake mast, a counter shaft carried by said meow@ a bracket secured to said end sill and having said brake mast journaled therein, a ratchet wheel mounted on said brake mast adjacent said bracket, a detent mounted on said bracket and adapted to engage said ratchet wheel, a housing journaled on the lower end of said brake mast above said step, said housing comprising upper and lower arms, a counter shaft journaled in said arms, gear mechanism connecting said brake mast and 10 In testimony whereof, l have subscribed 15 my name.

EDWARD POSSON. 

